Apparatus for projecting heated air.



N0. 656,2l3. Patented Aug. 2|, I900. L. PRAT.

APPARATUS FOR PBOJECTING HEATED AIR.

(Application filed May 1, 1900.)

(No Model.)

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NIT-ED STATES LOUISE PRAT, OF LYONS, FRANCE.

APPARATUS FOR PROJECTING HEATED AIR.

SPECIFICATION forming part of Letters Patent No. 656,213, dated August21, 1900.

Application filed May 1, 1900. Serial No. 15,092. V (N0 model.)

. To all whom it may concern:

Be it known that I, LoUIsE PRAT, (nee MINARD,) a citizen of France,residing at Lyons, France, have invented a new anduseful Apparatus forProjecting I'Iighly-Heated Air Under Pressure, of which the following isa full, clear, and exact description, and for which I have madeapplication for patent in France, dated December 4, 1899.

The apparatus forming the subject of the present invention is intendedfor the application of a new therapeutic method which consists inprojecting upon the affected parts a small jet of air heated to a hightemperature with the object of benumbing, purifying, or cauterizing suchparts.

The accompanying drawing shows the arrangement of the completeapparatus.

a is a reservoir which may be of various dimensions, according to theimportance of the installation, and in which air is compressed to apressure which may rise to fifty atmospheres, according to requirements.

I) is a main conduit capable of supplying one or several apparatusessimilar to that about to be described and which is represented in thedrawing at c.

The said apparatus is of the following construction:

c is a tube which is made of or covered with badly-conducting materialto enable it to be readily handled. It is closed at its upper part by acap or stopper (1, onto which are screwed nozzles of differentshapessuch,for instance, as e-which serve to project the hot air uponthe afiected part. At the lower part it carries two tubesone at itsaxis, serving to receive the heating apparatus f, the other at the side,provided on the exterior with a regulatingcock g, to which is connecteda flexible tube h, conveying compressed air to the interior of the tube.Between the conduit b and the cock 9 is interposed a reducing-valve p ofany known and suitable construction, bringing the air from the reservoirto the most GOIIVGIP ient pressure for the operation for which it isrequired. The air thus introduced into the tube 6 is heated near itsexitby a platinum tube f, closed and brought to incandescence by acurrent of carbureted air entering the interior. For this purpose aspecial conduit t, branching from the conduit 1), conveys at current ofcompressed air to the interior of a reservoir Z, containing asufficiently-volatile hydrocarbon. The air, mixed withcarburetingvapors,is delivered by a conduit m into a tube a, surroundedby a tuber, which traverses the apparatus 0 axially and is terminated bythe platinum tubef. After having maintained incandescence it leaves theapparatus by the exterior tube r, whence it escapes into the at mosphereby an opening 0, formed in said tube.

The entrance of air into the reservoir Z is regulated by a cook 76. Thevalve j serves to isolate the reservoir at the end of the operationwithout disarranging the opening of the cook 70.- v

According to the quantity of air consumed by the jet or nozzle 6 and thetemperature desired to be given to it, larger or smaller platinum tubesare employed, and the supply of carbureted air is regulated to maintaintheir incandescence.

, The tubes m and h, which lead to the apparatus c, are flexible,thereby enabling the apparatus to be readily manipulated and to conductthe air to the affected part. The jet can be moderated or stopped duringthe operation by means of the cock g. Before directing the carburetedair into the platinum tubef the operation is commenced by heating saidtube to incandescence, which is then maintained by the gaseous current.

a is a stop-cock between the conduitb and the reservoir a, and p is astop-cock between the reducing-valve p and the tube h.

Having fully described my invention, what I claim, and desire to secureby Letters Patent, is

1. In combination with a tube through which air may be projected to theaffected part directly, an air-reservoir, a conduit-pipe leadingtherefrom to the tube, a reducingvalve in said pipe, 'a'platinum tube insaid air-projectiug tube, an air-pipe leading from the said reservoir tothe platinum tube and a carbureter in the said air-pipe, substantiallyas described.

2. In an apparatus for projecting air at a determined pressure andtemperature, the combination of a high-pressure air-reservoir, areducing-valve, an air-carbureting appara tus, tubes connecting thecompressed-air reservoir with the reducing-valve and carburetingapparatus, a non-conducting air heating and projecting apparatusconnected by tubes to the reducing-valve, and carbureting apparatus, andregulating and stop cocks on the tubes connecting the compressed-airreservoir with the reducing-valve and carbureter and on the tubeconnecting the reducingvalve with the air heating and projectingapparatus, substantially as herein set forth.

3. In an apparatus for projecting air at a determined pressure andtemperature, the combination with a high-pressure air-reservoir, areducing-valve and a carbureting apparatus connected together by tubesprovided with suitable stop-cocks and regulating-cocks, of an airheating and projecting apparatus consisting of a closed non-conductingcylinder, having an air-projecting nozzle at one end, a movable centraltube connected to the carbureter by a flexible tube and conveying thecarbureted air to the interior of the apparatus near to the nozzle, atube surrounding said central tube and closed at its upper end by aclosed platinum tube and passing to the exterior of said apparatus whereit is provided with an exit-orifice, and a short side tube at its lowerend provided with a regulating-cock and connected to the reducing-valveby a flexible tube fitted with a stop-cock, substantially as herein setforth.

In testimony whereof I afiix my signature in presence of two witnesses.

LOUISE PRAT.

Vitnesses:

THOS. N. BROWNE, GASTON J EAUNIAUX.

